Time-calculator



(No Model.)

S. S. STREOK. TIM'E GALGULATOR.

No. 337,533. Patented Mar. 9, 1886.

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N PETERS PlmXo-Lrlhogmphnr. Washington, DC.

UNITED 'Sra ras PATENT Grinch.

SULLIVAN S. STRECK, OF NEW ORLEANS, LOUISIANA.

TiME-CALCULATOR.

SPECIFICATION forming part of Letters Patent No. 337,533, dated March 9,1886.

Application filed November 23, 1885. Serial No. 183.7%. (No model.)

T 0 (ZZZ whom it may concern.-

Be it known that I, SrLLIvAN S STREOK, of New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and usefulImprovement in Time-Calculators, of which the following is aspecification, reference being had to the annexed drawings, forming partthereof, in which- Figure l is a face view of my improvedtime-calculator. Fig. 2 is a central transverse section; and Fig. 3 is aview of part of the instrument, illustrating the manner of using thesame.

Similar letters of reference indicate corresponding parts in thedifferent figures.

The object of my invention is to provide a simple, inexpensive, andeasily-operated device for calculating the time from any part of thetwenty-four hours to any other part.

My invention is especially designed for the use of time-keepers orforemen in manufac turing establishments, to enable them to readilycalculate the amount of time consumed by any workman upon any job.

My invention consists in a graduated circle formed on a suitable surfaceand in a graduated disk arranged to revolve in front of the circle, thegraduated circle being provided with two sets of graduations runningfrom one to twelve, and the movable graduated disk having one set ofgraduations running from one to twenty-four.

The plate A, forming the body of the instrument, has a circle, B, whichis divided into twenty-four equal parts, representing the twenty-fourhours of the day, and each of the larger divisions is subdivided intohalf and quarter hours and into smaller divisions of five minutes. Thecircle B is divided into halves a o, and the larger divisions of eachhalf are numbered from one to twelve, representing the twelve hours ofthe day and night divisions of the day. Opposite the twelvemark upon oneside of the plate A is placed an arrow, 1), indicating thestarting-point.

To the plate A is pivoted a disk, 0, co axially with the circle B, andthe edge of the disk 0 is divided into twenty-four large divisions,representing hours, and each large division is subdivided into halvesand quarters, and into spaces representing five minutes of time. Thelarger graduations of the disk 0 are numbered reversely from one totwenty-- four, and opposite the graduation marked twenty-four is placedan index, I). When the index I) of the disk 0 is opposite the arrow 2)upon the plate A, the calculator is in condition for use.

By moving the disk 0 forward in the direction indicated by the arrowuntil the indeX Z) arrives at the hour or subdivision thereof on theupper half, a, of the scale B at which the workman finished his work,then by following the graduated circle B backward to the hour at whichthe workman began his work, and observing the figure or graduation onthe disk 0 oppositethe mark representing the hour of beginning work, themark or the graduation thus indicated on the disk 0 will represent thenumber of hours occupied by the workman.

Fig. 3 shows an examplein which the workman stopped work at half-pastone. The intier; 1) is therefore moved to a point opposite the markrepresenting half-past one upon the upper half, a, ofthe circle B. Hebegan work at half-past eleven. N ow, by following the graduations ofthe upper half, a, of the scale B backward past the figure twelve to themark representing half-past eleven, it will be observed that the mark onthe disk 0 opposite the half-past-eleven mark on the circle B isnumbered two, thus indicating that the workman was employed two hours.

By the employment of my improved calculator, the time-keeper or theforeman of a shop will be able to readily make the calculations requiredto show the number of hours and minutes the workman was engaged, and notonly will he be able to save all the time required to make suchcalculations, but he will arrive at perfectly accurate results.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. The plate A, having formed thereon a graduated circle, B, dividedinto hours and subdivisions thereof, each half of the circle beingnumbered from one to twelve, and in combination therewith of a disk, 0,divided into twenty-four parts representing hours, each part beingsubdivided, substantially as herein shown and described.

2. In a time-calculator, thegraduated circle B, divided into twenty-fourequal divisions representing the hours of the day, the divisions of eachhalf of the circle being numbered from one to twelve, and subdivided asde- 5 scribed, and provided with the index 5, and the disk 0, pivotedco-axially with the circle B, and provided with twenty-four equalgraduations around the edge thereof, said graduations being numberedfrom one to twentyfour successively and subdivided, and the in- [0 dexb, formed on the disk 0, combined and arranged as herein specified.

SULLIVAN S. STREGK. Witnessesi M. HERNANDEZ, EMILE C. J EUNESSE.

